Cristian D. Panda
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View article: Heatpipe-cooled in-vacuum electromagnet for quantum science experiment
Heatpipe-cooled in-vacuum electromagnet for quantum science experiment Open
Quantum inertial sensors test general relativity, measure fundamental constants, and probe dark matter and dark energy in the laboratory with outstanding accuracy. Their precision relies heavily on carefully choreographed quantum control o…
View article: Measuring gravity by holding atoms
Measuring gravity by holding atoms Open
Despite being the dominant force of nature on large scales, gravity remains relatively elusive to experimental measurement. Many questions remain, such as its behavior at small scales or its role in phenomena ascribed to dark matter and da…
View article: Atomic gravimeter robust to environmental effects
Atomic gravimeter robust to environmental effects Open
Atomic accelerometers and gravimeters are usually based on freely falling atoms in atomic fountains, which not only limits their size but also their robustness to environmental factors, such as tilts, magnetic fields, and vibrations. Such …
View article: Dynamics of a buffer-gas-loaded, deep optical trap for molecules
Dynamics of a buffer-gas-loaded, deep optical trap for molecules Open
We describe an approach to optically trapping small, chemically stable molecules at cryogenic temperatures by buffer-gas loading a deep optical dipole trap. The ∼10K trap depth will be produced by a tightly focused, 1064-nm cavity capable …
View article: Atomic gravimeter robust to environmental effects
Atomic gravimeter robust to environmental effects Open
Atomic accelerometers and gravimeters are usually based on freely-falling atoms in atomic fountains, which not only limits their size, but also their robustness to environmental factors such as tilts, magnetic fields or vibrations. Such li…
View article: Dynamics of a buffer-gas-loaded, deep optical trap for molecules
Dynamics of a buffer-gas-loaded, deep optical trap for molecules Open
We describe an approach to optically trapping small, chemically stable molecules at cryogenic temperatures by buffer-gas loading a deep optical dipole trap. The ~10 K trap depth will be produced by a tightly-focused, 1064-nm cavity capable…
View article: High-sensitivity low-noise photodetector using a large-area silicon photomultiplier
High-sensitivity low-noise photodetector using a large-area silicon photomultiplier Open
The application of silicon photomultiplier (SiPM) technology for weak-light detection at a single photon level has expanded thanks to its better photon detection efficiency in comparison to a conventional photomultiplier tube (PMT). SiPMs …
View article: High-sensitivity low-noise photodetector using large-area silicon photomultiplier
High-sensitivity low-noise photodetector using large-area silicon photomultiplier Open
The application of silicon photomultiplier (SiPM) technology for weak-light detection at a single photon level has expanded thanks to its better photon detection efficiency in comparison to a conventional photomultiplier tube (PMT). SiPMs …
View article: Coherence limits in lattice atom interferometry at the one-minute scale
Coherence limits in lattice atom interferometry at the one-minute scale Open
In quantum metrology and quantum simulation, a coherent non-classical state must be manipulated before unwanted interactions with the environment lead to decoherence. In atom interferometry, the non-classical state is a spatial superpositi…
View article: SiPM module for the ACME III electron EDM search
SiPM module for the ACME III electron EDM search Open
View article: Measurement of the H$^3\\Delta_1$ Radiative Lifetime in ThO
Measurement of the H$^3\\Delta_1$ Radiative Lifetime in ThO Open
The best limit on the electron electric dipole moment (eEDM) comes from the\nACME II experiment [Nature \\textbf{562} (2018), 355-360] which probes physics\nbeyond the Standard Model at energy scales well above 1 TeV. ACME II measured\nthe…
View article: Snowmass 2021 White Paper: Tabletop experiments for infrared quantum gravity
Snowmass 2021 White Paper: Tabletop experiments for infrared quantum gravity Open
Progress in the quantum readout and control of mechanical devices from single atoms to large masses may enable a first generation of experiments probing the gravitational interaction in the quantum regime, conceivably within the next decad…
View article: Simple self-calibrating polarimeter for measuring the Stokes parameters of light
Simple self-calibrating polarimeter for measuring the Stokes parameters of light Open
A simple, self-calibrating, rotating-waveplate polarimeter is largely insensitive to light intensity fluctuations and is shown to be useful for determining the Stokes parameters of light. This study shows how to minimize the in situ self-c…
View article: Simple Self-calibrating Polarimeter for Measuring the Stokes Parameters\n of Light
Simple Self-calibrating Polarimeter for Measuring the Stokes Parameters\n of Light Open
A simple, self-calibrating, rotating-waveplate polarimeter is largely\ninsensitive to light intensity fluctuations and is shown to be useful for\ndetermining the Stokes parameters of light. This study shows how to minimize\nthe in situ sel…
View article: Raman transitions driven by phase-modulated light in a cavity atom interferometer
Raman transitions driven by phase-modulated light in a cavity atom interferometer Open
Atom interferometers in optical cavities benefit from strong laser intensities and high-quality wavefronts. The laser frequency pairs that are needed for driving Raman transitions (often generated by phase modulating a monochromatic beam) …
View article: Data for probing gravity by holding atoms for 20 seconds
Data for probing gravity by holding atoms for 20 seconds Open
Data for figures.
View article: Data for probing gravity by holding atoms for 20 seconds
Data for probing gravity by holding atoms for 20 seconds Open
Data for figures.
View article: Probing gravity by holding atoms for 20 seconds
Probing gravity by holding atoms for 20 seconds Open
Trapped atoms to probe gravity Exploiting the wave nature of atoms in an interferometer setup can be used to provide a precise measure of gravity. The precision is limited to the time scale of the interferometric measurement, which in turn…
View article: Roadmap on STIRAP applications
Roadmap on STIRAP applications Open
STIRAP (stimulated Raman adiabatic passage) is a powerful laser-based method, usually involving two photons, for efficient and selective transfer of populations between quantum states. A particularly interesting feature is the fact that th…
View article: Probing gravity by holding atoms for 20 seconds
Probing gravity by holding atoms for 20 seconds Open
Atom interferometers are powerful tools for both measurements in fundamental physics and inertial sensing applications. Their performance, however, has been limited by the available interrogation time of freely falling atoms in a gravitati…
View article: Order of Magnitude Improved Limit on the Electric Dipole Moment of the Electron
Order of Magnitude Improved Limit on the Electric Dipole Moment of the Electron Open
The Standard Model of particle physics accurately describes with amazing precision all particle physics measurements made in the laboratory. However, it is unable to answer many central questions that arise from cosmological observations, …
View article: Methods, analysis, and the treatment of systematic errors for the electron electric dipole moment search in thorium monoxide
Methods, analysis, and the treatment of systematic errors for the electron electric dipole moment search in thorium monoxide Open
We recently set a new limit on the electric dipole moment of the electron (eEDM) (J Baron et al and ACME collaboration 2014 Science 343 269–272), which represented an order-of-magnitude improvement on the previous limit and placed more str…
View article: A self-calibrating polarimeter to measure Stokes parameters
A self-calibrating polarimeter to measure Stokes parameters Open
An easily constructed and operated polarimeter precisely determines the relative Stokes parameters that characterize the polarization of laser light. The polarimeter is calibrated in situ without removing or realigning its optical elements…
View article: An Underappreciated Radiation Hazard from High Voltage Electrodes in Vacuum
An Underappreciated Radiation Hazard from High Voltage Electrodes in Vacuum Open
The use of high voltage (HV) electrodes in vacuum is commonplace in physics laboratories. In such systems, it has long been known that electron emission from an HV cathode can lead to bremsstrahlung X-rays; indeed, this is the basic princi…
View article: An Underappreciated Radiation Hazard from High Voltage Electrodes in\n Vacuum
An Underappreciated Radiation Hazard from High Voltage Electrodes in\n Vacuum Open
The use of high voltage (HV) electrodes in vacuum is commonplace in physics\nlaboratories. In such systems, it has long been known that electron emission\nfrom an HV cathode can lead to bremsstrahlung X-rays; indeed, this is the basic\npri…
View article: Stimulated Raman adiabatic passage preparation of a coherent superposition of ThO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msup><mml:mi>H</mml:mi><mml:mn>3</mml:mn></mml:msup><mml:msub><mml:mi mathvariant="normal">Δ</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:mrow></mml:math>states for an improved electron electric-dipole-moment measurement
Stimulated Raman adiabatic passage preparation of a coherent superposition of ThOstates for an improved electron electric-dipole-moment measurement Open
Experimental searches for the electron electric-dipole moment (EDM) probe new physics beyond the standard model. The current best EDM limit was set by the ACME Collaboration [Science 343, 269 (2014), 10.1126/science.1248213], constraining …